JP4361775B2 - Bridge erection method and bridge erection device - Google Patents

Description

  The present invention relates to a bridge erection method and a bridge erection device used for erection of a prestressed concrete bridge.

  Conventionally, various construction methods have been proposed in which segments are erected sequentially while maintaining balance on both sides around a pier. The bridge erection method using precast concrete blocks (segments) has been widely used in recent years because it has advantages such as shortening the construction period and reliability of construction.

As a conventional bridge erection method, for example, a precast block manufactured in a factory or a yard is suspended and conveyed by a transfer carriage traveling on a bridge girder, conveyed to an erection work vehicle, and then transferred onto the erection work vehicle. There is known a method in which a precast block is lifted and joined.
The bridge erection device is composed of self-propelled means equipped with a self-propelled scaffold that moves on the bridge girder, and self-propelled lifting means that is provided on the self-propelled means and moves freely on the self-propelled means. It is known that the running means is fixed by fixing means provided at a predetermined position of the existing girder. In addition, as a self-propelled scaffold, an apparatus including a self-propelled scaffold for bonding a precast block and a tension self-propelled scaffold for a prestress cable is known.
Japanese Patent No. 2768281 JP-A-10-195827

  However, the conventional bridge erection method has a drawback that the total weight of the equipment used for erection becomes a considerable weight. In addition, because it is a two-part facility consisting of a self-propelled traveling cart and an erection work vehicle, when a bridge-type crane with a load suspended moves to the erection work vehicle, there is a step difference from the rail laid on the erection work vehicle It is difficult to transfer. In addition, vibrations and shocks are generated when changing, and work takes time. Furthermore, when the traveling carriage does not have a self-propelled device, it has to be moved by a chain block or the like, which requires time and labor for the moving work. In addition, since the construction work vehicle travels on the steel H arranged on the existing girders, there is a drawback that it takes time to move the construction work vehicle.

  The present invention has been proposed in view of the above, and smoothly rehangs a precast block from a transfer carriage to an erection work vehicle, while ensuring the speed of construction work and reducing the total weight of the erection work vehicle. An object of the present invention is to provide a bridge erection method and a bridge erection device that can be used.

In order to achieve the above object, the invention described in claim 1 is characterized in that a segment attached to a segment attachment beam is grounded by a lifting mechanism provided in a transfer carriage on a transfer carriage rail installed on a main girder. The segment lifting process, lifting the segment, lifting the transfer carriage along the transfer carriage rail to the working position of the erection work vehicle, and the extension beam provided on the lifting mechanism of the transfer carriage. Temporary suspension process of temporarily suspending with the lifting mechanism provided on the work vehicle, and the suspending process of advancing the segment to the lifting mechanism position of the construction work vehicle on the overhanging beam and suspending the segment to the lifting mechanism of the construction work vehicle If, lifted and movable carriage retraction step of retracting to its initial position along the conveying car rail for the movable carriage, a segment of the lifting mechanism erection work vehicle to the working position A step-up Ri, together with applying an adhesive to bonding surfaces of the segments, disconnect the segment bonding step of bonding the segments by tensioning by inserting a PC steel sheath, the segment mounting beam from the bonded segments, erection a set anchors to secure the service vehicle to the main girder removed from the main girder, in the reaction force receiving roller moves the lower end is fixed to the main girder with separate the erection work vehicle from the main digits anchor jack is contracted to support from below The construction work vehicle moving process in which the construction work vehicle is moved forward on the main girder by the drive mechanism while being supported from above, and after the construction work vehicle is moved, the setting anchor and the anchor jack are set on the main girder, and the lower end is mainly used. The construction work vehicle fixing step includes setting and fixing the reaction force receiving roller for movement fixed to the girder to the main girder at the advanced position .

  The invention according to claim 2 is characterized in that a plurality of segments are lifted in the segment lifting step.

The invention described in claim 3 is a bridge erection device comprising an erection work vehicle capable of self-propelling on an existing girder and a transfer carriage capable of self-propelling on the existing girder, wherein the erection work vehicle A lifting mechanism and a workbench, and the transfer carriage includes a lifting mechanism for the transfer carriage. The transfer carriage extends on rails laid on both sides of the construction work vehicle to the position of the construction work vehicle. movable der is, lifting mechanism for the transfer carriage is provided with a overhanging beam with an electric trolley, as a feature capable der Rukoto transfer the lifting segment in lifting mechanism provided on the erection work vehicle Yes.

The invention of claim 5, wherein the erection plurality of workbench lifted by the work table lifting mechanism which can be moved in the longitudinal direction of the nose provided in the working vehicle, the front and rear segments when the segments lifting It can be opened and closed.

  Since this invention consists of an above-described structure, there can exist an effect which is demonstrated below.

  In the first aspect of the present invention, a segment lifting process in which the segment is lifted from the ground by a lifting mechanism provided in the transfer carriage, and a transfer carriage advancement process in which the transfer carriage is advanced to the working position of the construction work vehicle while the segment is suspended. And a temporary suspension process in which the extension beam provided in the lifting mechanism of the transfer carriage is temporarily suspended by the lifting mechanism provided in the construction work vehicle, and the segment is advanced to the lifting mechanism position of the construction work vehicle on the extension beam, A suspending process for suspending the segment to the lifting mechanism of the erection work vehicle, a retraction process for moving the trolley to the initial position, a lifting process for lifting the segment to the construction position by the lifting mechanism of the erection work vehicle, and a segment Segment jointer that joins segments by applying PC steel to the sheath and tensioning it while applying adhesive to the joint surface The segment mounting beam is cut off, the set anchor is removed, the anchor jack is pulled in, the construction work vehicle moving process in which the construction work vehicle is advanced by the drive mechanism, and after the construction work vehicle is moved, the set anchor and the anchor jack are mainly used. Since it is set in the girder and the construction work vehicle fixing process in which the moving reaction force receiving roller is moved forward and set in the main girder, the work of suspending the segment from the transfer carriage to the construction work vehicle becomes easy, and the construction work can be performed quickly. Can be realized. Moreover, even when the lifting position of the segment is limited, a large heavy machine for lifting the segment is unnecessary.

  In the invention according to claim 2, since the plurality of segments are lifted in the segment lifting step, the speed of the construction work can be achieved and the construction period can be shortened.

  According to a third aspect of the present invention, there is provided a bridge erection device including an erection work vehicle capable of self-propelling on an existing girder and a transfer carriage capable of self-propelling on the existing girder. In addition to a heavy mechanism and a workbench, the transfer carriage includes a lifting mechanism for the transfer carriage, and the transfer carriage can move to the position of the installation work vehicle on rails laid on both sides of the installation work vehicle. Therefore, the work of suspending the segment from the transfer carriage to the erection work vehicle becomes easy, and the construction work can be speeded up. Therefore, the construction of the prestressed concrete bridge can be completed in a short period of time.

  In the invention according to claim 4, the lifting mechanism for the transfer carriage includes an overhanging beam and an electric trolley, and the suspended segment can be transferred to the lifting mechanism provided in the construction work vehicle. The construction of prestressed concrete bridges can be completed in a short period of time.

  According to the fifth aspect of the present invention, the work table can be opened and closed so as not to get in the way when the segment is suspended, so that the efficiency of construction work can be achieved.

  The transfer trolley can be moved to the position of the erection work vehicle, and the precast block can be easily remounted from the transfer trolley to the erection work vehicle.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment. FIGS. 1-14 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, and FIGS. 1-14 (b) is the front view. Here, the bridge erection method of the present embodiment is a segment lifting process in which the segment 11 is lifted from the ground by the lifting mechanism 13 provided in the transfer carriage 12, and the transfer carriage 12 is suspended from the work while the segment is suspended. A forward movement step of moving the carriage to the position B, a temporary suspension step of temporarily hanging the extension beam 15 provided on the lifting mechanism 13 of the transfer carriage 12 by the lifting mechanism 21 provided on the construction work vehicle 20, Then, the segment 11 is moved forward to the lifting mechanism position A of the erection work vehicle 20 and the segment 11 is suspended from the lifting mechanism 21 of the erection work vehicle 20 and the transfer carriage is retracted to the initial position. Adhesives on the joint surface 29a of the process, the lifting process of lifting the segment 11 to the construction position by the lifting mechanism 21 of the erection work vehicle 20, and the segment A segment joining step for joining the segment 11 by inserting a PC steel material into the sheath and applying tension to the sheath, and separating the segment mounting beam 17, removing the set anchor 27, pulling in the anchor jack 26, and driving mechanism 25 The construction work vehicle moving step of moving the construction work vehicle 20 forward by the above-described steps, and after the construction work vehicle 20 is moved, the setting anchor 27 and the anchor jack 26 are set on the main girder 29 and the movement reaction force receiving roller 28 is advanced. The construction work vehicle fixing process is set in the main beam 29.

  In FIG. 1, a segment 11 conveyed to the vicinity of a pier by a trailer 10 is lifted by a lifting mechanism 13 provided in a transfer carriage 12. The lifting mechanism 13 includes an electric chain block 14, an overhang beam 15, an electric trolley 16, and a segment mounting beam 17. The segment attachment beam 17 is attached to the upper end of the segment 11 and attaches the segment 11 to the electric trolley 16. The electric trolley 16 is attached to the extended beam 15 and can move the segment 11 horizontally within the range of the extended beam 15. The overhanging beam 15 is attached to a chain 14 a suspended from the electric chain block 14.

  The transfer carriage 12 has an arm portion 12a having a substantially U-shaped cross section and a drive mechanism 19 for horizontally moving the arm portion 12a on a transfer carriage rail 18 laid on an existing main girder. Further, the transfer carriage rail 18 may be provided in advance on the upper surface of the segment 11.

  The erection work vehicle 20 includes a nose 20a configured in a girder system, a lifting mechanism 21 movable along the nose 20a, a work table 22, a work table lifting mechanism 23, and a work vehicle rail 24. A drive mechanism 25 that moves the construction work vehicle 20 along, an anchor jack 26 attached to the rear end, a set anchor 27, a moving reaction force receiving roller 28, and the like. The erection work vehicle rail 24 is laid inside the transfer carriage rail 18 laid on the upper surface of the existing main girder. The erection work vehicle rail 24 may also be laid in advance in the segment 11. In this embodiment, four construction work vehicle rails 24 are laid, and a drive mechanism 25 is placed thereon.

  FIG. 2 shows a segment lifting process in which the lifting mechanism 13 of the transfer carriage 12 lifts the segment 11 below the main beam 29. Here, a case where one segment 11 is lifted is shown, but two or three or more segments may be lifted (see FIG. 3).

  FIG. 4 shows a transfer carriage advancement process in which the transfer carriage 12 is moved on the transfer carriage rail 18 to the work position B of the erection work vehicle 20 while the segment 11 is suspended.

  FIG. 5 shows a temporary suspension process in which the extension beam 15 provided in the lifting mechanism 13 of the transfer carriage 12 is temporarily suspended by the lifting mechanism 21 provided in the construction work vehicle 20.

  FIGS. 6 to 8 illustrate a transfer process in which the segment is advanced to the lifting mechanism position of the erection work vehicle on the overhanging beam, and the transfer carriage is moved back to the initial position by suspending the segment to the lifting mechanism of the erection work vehicle. It shows a trolley retreat process. In FIG. 6, the segment 11 is advanced on the overhanging beam 15 by the electric trolley 16 to the A position. In FIG. 7, the segment 11 is suspended from the lifting mechanism 21 of the construction work vehicle 20. In FIG. 8, the transfer carriage 12 from which the segment 11 has been separated is moved back to the initial position.

  9 to 10 show a lifting process in which the segment is lifted to the construction position by the lifting mechanism of the construction work vehicle. In FIG. 9, the segment 11 is lifted to the position of the main beam 29, and in FIG. 10, the work table 22 is lifted to a predetermined position.

  FIGS. 11-13 shows the segment joining process which joins a segment by apply | coating an adhesive agent to the joining surface 29a of the main girder 29, and inserting and tensioning PC steel materials in a sheath. FIG. 11 shows an operation of applying an adhesive from the work table 22 to the joint surface 29 a of the main beam 29. In FIG. 12, a PC steel material (not shown) is inserted into a sheath (not shown) arranged in the segment 11 and is tensioned to join the segments. After tension, inject grout material. In FIG. 13, the segment mounting beam 17 is cut off from the upper surface of the joined segments.

  FIG. 14 shows a construction work vehicle moving process in which the anchor jack 26 is pulled in and the construction work vehicle is advanced by the drive mechanism 25. The anchor 27 for setting is removed, the anchor jack 26 is pulled in, and the construction work vehicle 20 is advanced by the drive mechanism 25.

  FIG. 15 shows a construction work vehicle fixing step in which, after the construction work vehicle 20 is moved, the setting anchor 27 and the anchor jack 26 are set on the main girder 29 and the movement reaction force receiving roller 28 is advanced and set on the main girder 29. Is shown.

  A prestressed concrete bridge can be erected quickly by repeating the above steps in sequence. As described above, according to the bridge erection method of the present invention, it is possible to facilitate the work of changing the segment from the transfer carriage to the erection work vehicle, thereby shortening the construction period and reducing the cost.

  The bridge erection apparatus of the present invention includes an erection work vehicle 20 capable of self-propelling on an existing girder and a transfer carriage 12 capable of self-propelling on the existing girder. 25, and a lifting carriage 13 on the transfer carriage 12 including a suspension worktable 22, and the transfer carriage 12 is provided on both sides of the erection work vehicle 20 with rails for the transfer carriage. 18 can be moved to the position of the construction work vehicle 20.

  Here, the nose 20a of the construction work vehicle 20 is configured by a girder method. That is, it is not a conventional truss structure, but has a structure in which two box-shaped steel girders are arranged. Further, the lifting mechanism 21 movable along the nose 20a is constituted by a chain block or the like. The work table 22 is suspended by a work table lifting mechanism 23 and can move in the vertical direction and the horizontal direction. The work table 22 is effective to be opened and closed. The erection work vehicle 20 can be moved by the drive mechanism 25 along the erection work vehicle rail 24. Further, the rear end portion of the nose 20a is fixed by an anchor jack 26, a setting anchor 27, a moving reaction force receiving roller 28, and the like.

  The bridge erection device configured as described above can facilitate the suspension of the segment from the transfer carriage to the erection work vehicle, and can shorten the construction period.

Fig.1 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.2 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.3 (a) is a side view which shows the case where two segments are lifted in the bridge construction method concerning this invention, (b) is the front view. Fig.4 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.5 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.6 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.7 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.8 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.9 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.10 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.11 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.12 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.13 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.14 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view. Fig.15 (a) is a side view which shows the construction procedure of the bridge in the bridge construction method concerning this invention, (b) is the front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Railer 11 Segment 12 Transfer cart 12a Arm part 13 Lifting mechanism 14 Electric chain block 14a Chain 15 Overhang beam 16 Electric trolley 17 Segment mounting beam 18 Rail for transfer cart 19 Drive mechanism 20 Construction work vehicle 20a Nose 21 Lifting mechanism 22 Work table 23 Work table lifting mechanism 24 Rail for construction work vehicle 25 Drive mechanism 26 Anchor jack 27 Anchor for setting 28 Reaction force receiving roller 29 for moving 29 Main girder 29a Joint surface

Claims (4)

A segment lifting process in which the segment attached to the segment mounting beam is lifted from the ground by the lifting mechanism provided in the transfer carriage on the rail for the transfer carriage installed on the main beam ;
A transfer carriage advance step of advancing the transfer carriage along the transfer carriage rail to the working position of the erection work vehicle with the segments suspended;
A temporary suspension step of temporarily suspending the extension beam provided in the lifting mechanism of the transfer carriage by the lifting mechanism provided in the construction work vehicle;
A suspending step of advancing the segment to the lifting mechanism position of the erection work vehicle on the overhanging beam, and suspending the segment to the lifting mechanism of the erection work vehicle;
A transfer carriage retracting step for retracting the transfer carriage along the rail for the transfer carriage to an initial position;
A lifting process for lifting the segment to the construction position by the lifting mechanism of the construction work vehicle, a segment joining process for joining the segment by applying an adhesive to the joining surface of the segment and inserting a PC steel material into the sheath and tensioning ,
Disconnect segment mounting beam from the bonded segments, a set anchors to secure the erection work vehicle in the main girder removed from the main girder, the lower end with away from the main girder to contract an anchor jacks supporting the erection work vehicle from below the main An erection work vehicle moving step in which the erection work vehicle is moved forward on the main girder by the drive mechanism while being supported from above by a moving reaction force receiving roller fixed to the spar ;
After the movement of the erection work vehicle, with sets set anchors and anchor jack main girder, erection work vehicle that the lower end is set fixed to the main girder locations to advance the reaction force receiving roller movement that is fixed to the main girder A bridge erection method characterized by comprising a fixing process.   The bridge erection method according to claim 1, wherein a plurality of segments are lifted in the segment lifting step. An erection work vehicle (20) capable of self-propelling on an existing girder;
A bridge erection device comprising a transfer carriage (12) capable of self-propelling on an existing girder,
The construction work vehicle is provided with a lifting mechanism (21) and a work table (22), and the transfer carriage is provided with a lifting mechanism (13) for the transfer carriage,
Said transfer carriage, Ri movable der on rails laid on both sides of the erection work vehicle to the position of the installation work vehicle,
The lifting mechanism for the movable carriage is provided with an overhanging beam with an electric trolley, bridge erection equipment characterized the next possible Rukoto transfer the lifting segment in lifting mechanism provided on the erection work vehicle. The work table lifted by a plurality of work table lifting mechanisms movable in the longitudinal direction of the nose provided on the construction work vehicle can be opened and closed before and after the segment when the segment is lifted. Item 4. The bridge erection device according to item 3.

Images